Added desktopgui to installation, updater and startup.

apps/desktopgui/TODO

@@ -15,7 +15,31 @@ HIGH PRIORITY:
   * One possibility:
         Adding some kind of 'ApplicationManager' that allows starting applications.
         Extra remark: ApplicationManager should also allow stopping certain applications from launching.
+        Suggestion:
+            * ApplicationManager reads/writes clients.config
+            * ApplicationManager itself: independent from clients.config?
+            * Upon reboot, ApplicationManager could add a new application to clients.config _if_ the 'application.manager.version' is not there, or is smaller than the current version.
+            * ApplicationManager can be the clients.config backend for routerconsole, so routerconsole is not the dependency.
+            * API:
+                - addConfig(args, name, ...)
+                - removeConfig(int)
+                - removeConfig(ConfigFilter)
+                    ConfigFilter() {
+                        boolean filterArgs(String args);
+                        boolean filterMain(String main);
+                        ...
+                    }
+                - editConfig(args, name, ..., ConfigFilter)
+                - editConfig(args, name, ..., int)
+                - editConfigArgs(args, ConfigFilter)
+                - editConfigArgs(args, int)
+                - ...
+ * For now: added in the routerconsole startup (like the old SysTray. - DONE
+    Possible migration path: startup ApplicationManager in routerconsole the first time.
+- Check bug: restart is happening instead of shutdown!
+- Check build order (for example: first desktopgui, only later routerconsole)
 - Fix tabs versus spaces ;-)
+- Add check for Java version 6 in RouterConsoleRunner!
 UNKNOWN:
 - API to allow applications to add themselves to the menu?
     * registerApplication(); -- should return a positive number on success, -1 on failure